BOULDER — Animal-control officers in Boulder have opened an investigation into reports that two young boys threw rocks at two ducklings, injuring them. The birds continue to recover at the Greenwood Wildlife Rehabilitation Center near Longmont.

The ducklings were brought in Thursday after William Nash said two kids throwing rocks at them near 28th Street and Baseline Road in Boulder hit them and separated them from their family.

Nash said the two boys — he said they appeared to be around 12 to 13 years old — ran from the scene. Nash added that there was a pile of rocks and that the boys looked like they had been throwing them at the ducks for quite some time before he arrived on scene.

Boulder police spokeswoman Kim Kobel said an investigation has been opened but that there was no new information or leads at this time.